Constellation optimization for coherent optical channels distorted by nonlinear phase noise

C. Hager, A. Graell I Amat, A. Alvarado, E. Agrell

Onderzoeksoutput: Hoofdstuk in Boek/Rapport/CongresprocedureConferentiebijdrageAcademicpeer review

7 Citaten (Scopus)


We consider the design of amplitude phase-shift keying (APSK) constellations, targeting their application to coherent fiber-optical communications. Phase compensation is used at the receiver to combat nonlinear phase noise caused by the Kerreffect. We derive the probability density function of the post-compensated observation for multilevel constellations. Optimal APSK constellations in terms of symbol error probability (SEP) are found assuming a two-stage detector. Performance gains of 3:2 dB can be achieved compared to 16-QAM at a SEP of 10-2. We optimize the number of rings, the number of points per ring, as well as the radius distribution of the constellation. For low to moderate nonlinearities, radius optimization only yields minor improvements over an equidistant spacing of rings. In the highly nonlinear regime, however, a smaller SEP can be achieved by “sacrificing” the outer ring of the constellation, in favor of achieving good SEP in the remaining rings.
Originele taal-2Engels
TitelIEEE Global Communications Conference (GLOBECOM) 2012
Plaats van productiePiscataway
UitgeverijInstitute of Electrical and Electronics Engineers
ISBN van elektronische versie978-1-4673-0921-9
ISBN van geprinte versie978-1-4673-0920-2
StatusGepubliceerd - dec 2012
Evenement2012 IEEE Global Communications Conference (GLOBECOM 2012) - Anaheim, CA, USA, Anaheim, CA, Verenigde Staten van Amerika
Duur: 3 dec 20127 dec 2012


Congres2012 IEEE Global Communications Conference (GLOBECOM 2012)
Verkorte titelGLOBECOM 2012
Land/RegioVerenigde Staten van Amerika
StadAnaheim, CA


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